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Calculați masele moleculare a 5 substante
CuCO3
ZnS
KClO3
Fe2O3
Al2O3
Mulțumesc anticipat ! :)


Răspuns :

M CuCO3=64+12+16×3=48+64+12=124 u.a.m
M ZnS=65+32=97 u.a.m
M KCIO3=39+12+126+16×3=48+51+126=225 u.a.m
M Fe2O3=56×2+16×3=112+48=160 u.a.m
M Al2O3=27×2+16×3=54+48=102 u.a.m